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(in millions) | | | | | |
Years Ended December 31 | 2023 | | 2022 | | 2021 |
Accumulated net unrealized gains (losses) on investment securities: | | | | | |
Balance at beginning of period, net of tax | $ | (2,319) | | | $ | (99) | | | $ | 211 | |
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Net unrealized gains (losses) arising during the period | 361 | | | (2,903) | | | (406) | |
Less: Provision (benefit) for income taxes | 85 | | | (683) | | | (96) | |
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Change in net unrealized gains (losses) on investment securities, net of tax | 276 | | | (2,220) | | | (310) | |
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Balance at end of period, net of tax | $ | (2,043) | | | $ | (2,319) | | | $ | (99) | |
Accumulated net (losses) gains on cash flow hedges: | | | | | |
Balance at beginning of period, net of tax | $ | (942) | | | $ | 55 | | | $ | 155 | |
Net cash flow hedge gains (losses) arising during the period | 34 | | | (1,329) | | | (35) | |
Reclassification of loss related to de-designation of derivatives to other noninterest income | (195) | | | — | | | — | |
Less: Benefit for income taxes | (38) | | | (313) | | | (8) | |
Change in net cash flow hedge losses arising during the period, net of tax | (123) | | | (1,016) | | | (27) | |
Less: | | | | | |
Net cash flow (losses) gains included in interest and fees on loans | (576) | | | (25) | | | 95 | |
Amortization of unrealized losses related to de-designated derivatives included in interest and fees on loans | (26) | | | — | | | — | |
Less: (Benefit) provision for income taxes | (142) | | | (6) | | | 22 | |
Reclassification adjustment for net cash flow hedge (losses) gains included in net income, net of tax | (460) | | | (19) | | | 73 | |
Change in net cash flow hedge gains (losses), net of tax | 337 | | | (997) | | | (100) | |
Balance at end of period, net of tax (a) | $ | (605) | | | $ | (942) | | | $ | 55 | |
Accumulated defined benefit pension and other postretirement plans adjustment: | | | | | |
Balance at beginning of period, net of tax | $ | (481) | | | $ | (168) | | | $ | (302) | |
Actuarial gain (loss) arising during the period | 96 | | | (415) | | | 159 | |
Prior service credit arising during the period | — | | | — | | | 1 | |
Net defined benefit pension and other postretirement plans adjustment arising during the period | 96 | | | (415) | | | 160 | |
Less: Provision (benefit) for income taxes | 25 | | | (98) | | | 38 | |
Net defined benefit pension and other postretirement plans adjustment arising during the period, net of tax | 71 | | | (317) | | | 122 | |
Amounts recognized in other noninterest expenses: | | | | | |
Amortization of actuarial net loss | 36 | | | 28 | | | 40 | |
Amortization of prior service credit | (23) | | | (23) | | | (25) | |
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Total amounts recognized in other noninterest expenses | 13 | | | 5 | | | 15 | |
Less: Provision for income taxes | 3 | | | 1 | | | 3 | |
Adjustment for amounts recognized as components of net periodic benefit credit during the period, net of tax | 10 | | | 4 | | | 12 | |
Change in defined benefit pension and other postretirement plans adjustment, net of tax | 81 | | | (313) | | | 134 | |
Balance at end of period, net of tax | $ | (400) | | | $ | (481) | | | $ | (168) | |
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Total accumulated other comprehensive loss at end of period, net of tax | $ | (3,048) | | | $ | (3,742) | | | $ | (212) | |